PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/11-20:12:30
G02     31.0           57.4               11.7 +/-    0.87      13.7 +/-    0.87  0.050 / 0.040
G05     147.2          61.0               14.2 +/-    0.25      16.0 +/-    0.25  0.040 / 0.050
G06     54.5           15.2                8.8 +/-    1.86      21.7 +/-    1.86  0.030 / 0.040
G12     197.1          66.3               11.5 +/-    0.69      12.4 +/-    0.69  0.040 / 0.030
G20     197.9          28.1               16.2 +/-    1.73      29.5 +/-    1.73  0.040 / 0.040
G25     290.0          57.9               11.0 +/-    2.60      12.7 +/-    2.60  0.040 / 0.050
G29     308.9          30.4               11.5 +/-    1.20      20.0 +/-    1.20  0.030 / 0.030